SiO2(s) + 4HF(aq)
SiO2(s) + 6HF(aq)
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Solutions of less than 20% HF can produce pain and redness with delay up
to 24 hours after skin exposure. 20 to 50% HF produces pain and redness
within 8 hours, and solutions of more than 50% produce immediate
burning, redness and blister formation. Contact of the skin with the
anhydrous liquid produces severe burns |
Eyes :
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A case of fluoride poisoning of a girl aged 2(1/2) years is reported. "Although
the possibility of ingestion was originally denied by the mother,
repeated questioning revealed that prior to becoming ill the child had
been playing with a laundry powder. The mother had obtained this
material from a commercial laundry. The powder was identified as "Bayline
Brand Laundry Sour" (manufactured by BASF Wyandotte, Michigan), a
whitener sold only to commercial laundries. This contained sodium
silicofluoride (Na2SiF6) as its major ingredient ..." |